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Please go to command prompt and type ipconfig /all. This will show you the dns adresses assigned to the etehrnet or wireless adapters. Try to ping that dns address. If you are not able to ping the dns address, assign static ip and dns addresses to the computers.

If you are trying to connect your wireless router to your ADSL modem then ( ADSL Modem -->Wireless Router-->Your Computer) dont enter any values in the ISP, DNS and MAC address fields. Let them be on default as :Domain
Name Server (DNS) Address
Get Automatically From ISP

Router
MAC Address
Use Default Address This would then automatically pick up the settings from your modem.

Connect to the router's built-in web-server, and access the 'WAN Setup' page. Ensure that your ISP has handed-out an IP-address (and names of DNS-servers) to your router. Try to get it to "renew" the WAN IP-address.

Your friend is able to go online using the same wireless network. that means the wireless network is working properly and there might be a problem with your computer .You said that you can connect to the wireless network but you can not go online.Check the IP address and the default gateway of the computer.Try to ping the router and DNS server and check what happens.Make sure that there is no static IP address on the computer.

If you can connect directly to your virgin Media Broadband and get internet then your laptop and broadband router is fine.

The wireless router appears not to have a DNS entry and you will need to add that manually.

I suggest that you connect directly to the Broadband modem, be sure you can get onto the internet. Once you have confirmed you can get onto the internet you need to get the dns information from your Broadband modem for later.

once connected directly to the broadband modem, click start>run> then type "CMD" then click open. you will get a prompt type the following and record the DNS Server ip addresses.

once you have recorded them rerun the install, but this time instead of at the end of the install where it shows the Wireless router information you can modify or change it and add the DNS server entries.

Also by default most wireless routers ip address is 192.168.1.1 and you can type that from a internet explorer and change it from there as well. I believe it's no ID or user name and the password is admin.

make sure that the ip address that you are getting is a valid one and you are connected to the correct wireless network. for example, if your router's ip address id 192.168.1.1, your computer should have an ip address of 192.168.1.x. if you are getting a valid ip address and you're still getting the dns error, the thing that you can do is set a static ip address and dns to your ps3.
if you don't know the dns to use, go to the command prompt and type ipconfig/all and it'll give you a list that'll contain the dns servers. copy the dns and enter it on the ip settings of your ps3 together with the default gateway (ip address of the router), subnet mask (it's usually 255.255.255.0) and your ip address (make sure that the ip address that you'll set on the ps3 is not being used by any of your computers)

hope this'll help you and just ask me if your still having any problem

I assume this message indicates that wired connectiions to the router are successfully accessing the internet -- is that true?

Wireless are not accessing the internet, but appear to be connected to the router - is that true.

Do you know how to run PING? IF so ping the router from the wired and wireless and see if it works? IF it works wired and not wireless we have a wireless issue. IF it works from both we probably have a IP issue diagnosis follows this.

Do you know how to run IPCONFIG /ALL -- If so run it on the wired machine and the wireless machines -- gather the IP Address, Subnet Mask, Gateway, and DNS addresses from each machine. Any machine lacking DNS addresses or with invalid DNS addresses can not access the internet sites by name like www.google.com. If the gateway address is incorrect a machine cannot access the internet.

If you do not understand any of the above please ask by adding a comment to this message and I will attempt to provide detailed instructions.

Please provide the operating system of your computers to assist in providing directions.